DOI: 10.1016/j.scib.2020.01.019
论文题名: The C2H2 zinc-finger protein LACKING RUDIMENTARY GLUME 1 regulates spikelet development in rice
作者: Xu Q. ; Yu H. ; Xia S. ; Cui Y. ; Yu X. ; Liu H. ; Zeng D. ; Hu J. ; Zhang Q. ; Gao Z. ; Zhang G. ; Zhu L. ; Shen L. ; Guo L. ; Rao Y. ; Qian Q. ; Ren D.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
卷: 65, 期: 9 起始页码: 753
结束页码: 764
语种: 英语
中文关键词: Grain size
; LRG1
; Rice (Oryza sativa)
; Rudimentary glume
; Spikelet determinacy
; Sterile lemma
英文关键词: Genes
; Grain size and shape
; Proteins
; Zinc
; Grain size
; LRG1
; Rice (oryza sativa)
; Rudimentary glume
; Spikelet determinacy
; Sterile lemma
; Grain (agricultural product)
英文摘要: Rice (Oryza sativa) spikelets are a unique inflorescence structure and their development directly determines grain size and yield. Although many genes related to spikelet development have been reported, the molecular mechanisms underlying this process have not been fully elucidated. In this study, we identified a new recessive rice mutant, lacking rudimentary glume 1 (lrg1). The lrg1 spikelets only formed one rudimentary glume, which, along with the sterile lemmas, was homeotically transformed into lemma-like organs and acquired lemma identity. The transition from the spikelet to the floral meristem was delayed in the lrg1 mutant, resulting in the formation of an ectopic lemma-like organ between the sterile lemma and the terminal floret. In addition, we found that the abnormal lrg1 grain phenotype resulted from the alteration of cell numbers and the hull size. LRG1 encodes a ZOS4-06-C2H2 zinc-finger protein with the typical EAR motifs, and is expressed in all organs and tissues. LRG1 localizes to the nucleus and can interact with the TOPLESS-RELATED PROTEINs (TPRs) to repress the expressions of their downstream target genes. Taken together, our results reveal that LRG1 plays an important role in the regulation of spikelet organ identity and grain size. © 2020 Science China Press Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170106
Appears in Collections: 气候变化与战略
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作者单位: State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou, 310006, China; College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, 321004, China
Recommended Citation:
Xu Q.,Yu H.,Xia S.,et al. The C2H2 zinc-finger protein LACKING RUDIMENTARY GLUME 1 regulates spikelet development in rice[J]. Science Bulletin,2020-01-01,65(9)